42018503 has 2 divisors, whose sum is σ = 42018504. Its totient is φ = 42018502.

The previous prime is 42018479. The next prime is 42018511. The reversal of 42018503 is 30581024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42018503 - 2¹⁴ = 42002119 is a prime.

It is a super-2 number, since 2×42018503² = 3531109188722018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42018533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009251 + 21009252.

It is an arithmetic number, because the mean of its divisors is an integer number (21009252).

Almost surely, 2^42018503 is an apocalyptic number.

42018503 is a deficient number, since it is larger than the sum of its proper divisors (1).

42018503 is an equidigital number, since it uses as much as digits as its factorization.

42018503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 42018503 is about 6482.1680786601. The cubic root of 42018503 is about 347.6537021699.

Adding to 42018503 its reverse (30581024), we get a palindrome (72599527).

The spelling of 42018503 in words is "forty-two million, eighteen thousand, five hundred three".